Warp stop motion for looms



E. S. STIMPSON.

WARP STOP MOTION FOR LOOMS.

- APPLICATION FILED JUNE 4,192l.

Patented Mar. '14, 1922.

g z 4 W W I ll 3 SHEETSSHEET 1- 7% ill E. s. STIMPSONZ WARP STOP MOTION FOR LOOMS.

' Patented Mar. 14, 1922.

3 SHEETS-SHEET 2.

s. STIMPSON.

WARP S'TOP MOTION FOR LOOMS. APPLICATION FILED JUNE 4; I921.

Patented Mar. 14, 1922.

3 SHEETS-SHEET 3.

Inven 1. 0 r

EDWARD. s- STIMPSON, or HQPEDALE, MASSACHUSETTS, AssIenon To DRAP'ER CORPORATION, OF'HOPEDALE, MASSACHUSETTS, A CORPORATION OF MAINE. Y

WARP STOP MOTION FOR LOOM S.

Application filed June 4,

To all 207mm it may concern. 7

Be it known that I, EDWARD S. STIMPsoN, a citizen of the United States, residing at Hopedale, in the county of-lVorcester and State of Massachusetts, have invented an Improvement in lVarp Stop Motions for Looms, of which, the following description, in connection with the accompanying drawings, is a specification, like characters on the drawings representing like parts. V

This invention relates to warp stop motions for ,looms, which effect loom stoppage when awarp thread becomes broken or too slack.

()ne of the objects :ofthepresent invention is'to provide a mechanicalwarp stopmotion which shalibe simple in construction and effective in operation, and wherein the parts shall befso combined as to occupy a. minimum-spaceina direction fore and aft of the loom and-at the same time not interfere with the desired size and position of the warp beam.

Other featuresof the invention relate to. 7 y 7 t V Y on the bracketfilpitjwill be directed into a novel construc-tionand combination of parts. all as willbe hereinafter more fully described in connection w th the accompany ng drawings which show one good form of means for carrying the inventlon nto practical elt'ect.

In the drawings: I i

F'gure 1 is a perspective view showing a aart of'the warp stop-motion proper; r V

Fig. 2 is a vertical section fore and aft of the loonnand through the warp stop motion proper;

Fig. 3 is a perspective view showing the warp stop motion supporting means, the drop wire guides, and associated parts;

Fig. l is a perspective view of the fecler carrier, showing it in its raised or inoperative position;

Fig. 5 is an enlarged sectionaldetail showing the brace for bracing the feelers;

Fig. 6 is an enlarged detail showing a brace for bracing the drop wire guides; and

Fig. 7 is a sectional side elevationshow- 'ing one unit of the warp stopniotion containing the present invention. V The loom frameha's secured tothe' sides thereof supporting means for the main parts oi -the warp stop motion proper, such supporting means being preferably provided as brackets 1. one at each side of the loom, on which are adjustably mounted Specification'of Letters Patent.

Patented Mar. 14, 1922.,- 1921. Serial no. 475,015. I brackets 2 which directly support the drop wire guides. The two brackets 1 and 2 may be connected togetherby appropriate slot and bolt connections, as indicated in Fig.1,

3, whereby the relation'of the warp stop motionproper'with other parts of the loom may be readily effected. In the present instance of the invention the bracket 1 is provided with a slot '3 and the bracket 2 with a slotted projection 4, the proj ection and slot 'SQbeing connected together a-bolt 5',

' The upstanding flange ofthe bracket '2 is provided with recesses or openings 'for re ceiving the ends; of the 1 drop 7 wire guides which may be held in place by suitable caps. lnlthe present instanceof the invention, the l1 rackets 2 are provided-withthe lugs 6, and

at each side otlug 6 the bracket Q/isprovided with a recess 7 in whicl fthe'end por-- tionotpne of the am wire guides 8 may rest. One wallt) of each 'recess'7'is inclined, as best shown in, Fig, 2, tofthe end that when the'drop wire guide Sis; placed infgpor sition in its receiving-and positioning recess H proper relation'witln and against the upright wall of. the lup; Vv henthe drop wir guides 8 have'bee'irplaced in their receivingj and positioningslotsion 'the loi'ackets 2, theyf;

may-be held in position by caps 1O (Fig'I-Zy) secured to J'the top -portions of'the 'lugs hyboltsllr The' movement'of the drop wires andto'r'eta'in them in associated relation, as well as to support thefdrop wires againsttlie action of the feeler, as will laterappear, when a drop wircguides serve todirectithe Y drop wire is relea'sed by'a broken or unduly slack Jwa'rp thread. I

'lVherethe warp stop motion-is located betweenthe warp beam or rear of the loom and the heddles, it is important that it be of minimum dimension fore and aft of the loom in order that it maybe properly located with respect tothe heddles and not inter fere with a desired 'sizeinthewarp beam or t'he warp wound upon the beam.

The drop wires 12, have enlarged upper ends 13 which, when a drop wire is released by a brokenfor unduly slack warpthread, moves into the path of the feeler, as will presently appear, and. arreststhe detecting movement of the feeler. The edge portion of the drop wires 12 whereon is located the enlargement 13, will hereinafter be desigioo nated as the face edge, and the other edge as let, will be noted as the back of the feeler. Each drop wire is provided with an elongated slot 15 and the drop wires are arranged in rows, with one of the drop wire guides 8 passed through the elongated slot of the drop wires in a row. The slotted type of drop wire is preferably employed in the present instance of the invention, but other forms of drop wires having enlargements along the fac edge may be adi 'antageously employed.

Two rows of drop wires constitute a unit of the stop motion, as indicated in Fig. 7, and any number of such units may be as sembled in the formation of the entire warp stop mechanism. Inasmuch as the warp stop motion should occupy as little space fore and aft of the loom as possible, two rows of drop wires constituting a unit are arranged in close relation back to back, with the enlargements 13 at the upper face edge of the drop wires extending in opposite directions. The drop wires, as usual in warp stop mechanisms, are each provided with a warp engaging portion which in the present instance of the invention comprises an eye or opening 16 formed in each of the drop wires, through which pass one of the warp threads at.

The warp threads adjacent the drop wires rest upon suitable warp supports. As shown, such supports are formed by bars or rods 17 and 18 which extend transversely of the loom frame and are preferably supported at each endby socket portions 19 formed on the supporting brackets 2. The warp supports 18, which are located between the backs 1a of the drop wires, .should interfere as little as possible with the close back-00 backrelation of the drop wires, and to this end the warp supports 18 are preferably made smaller in cross sectional dimensions than the other warp supports 17 as indicated in Figs. 2 and 7. Insome cases, especially where the loom is wide, it may be desired to brace the drop wire guides so that they may withstand the side pressure of the feelers transmitted through one of the drop wires when it is released by a broken or unduly slack warp thread. In Fig. 3, four braces 20sare shown, but any suitable number may be employed. Each of the braces 20 is secured to a'rod or bar 21 extending transversely of the loom and preferably supported by the bearings 22 formed in the side supporting brackets 2. The rod or bar 21 may be secured to the brackets by suitable clampsv 23. The braces 20 are shown provided with hub portions 2 1 which slide along the rod or bar 21 and may be clamped in adjustedposition by means of the bolts 25. The upper edge portions of each of the braces 20,are .formedto engage and brace the drop wire guides, and as shown, each of thebraces 20 has one or more lugs 26, ac-

cording to the number of units comp-rising the warp stop motion; and at each side of the lug 26 the brace 20 is recessed to receive the end of thedrop wire guide, as indicated in Fig. 6, one wall 27 of each recess being beveled or cut-away to guide or direct the drop wire guide into proper position relative to the brace.

Each rowof each drop wire unit of the warp. stop motion has associated therewith a feeler which acts only upon the drop wires of one row. In order that the warp stop motion shall not interfere with the desired size of the warp beam, the feelers are supported for their detecting movement above the plane of the warp threads, and inasmuch .as the feeler detecting movement is one of reciprocation, the feelers are arranged above the warp threads in a horizontal plane passing through the drop wire guides, the effect being that when a dop wire is released by a broken or unduly slack warp thread, as indicated in Figs. 2 and 7, the drop wire guide on which the drop wire is hung will brace. the part of the drop wire which is engaged bythe associated feeler. This condition is well illustrated by Fig. 2, wherein the drop wire at the left is indicated as having been freed by a broken warp thread a. It is at times desirable to run the loom without stoppingit due to a warp fault,and to this end the present invention provides a feeler carrier which supports the feelers in position above the plane of the warp threads with permissive movement of the feelers into inmovement ofthe feelers heightwise of the drop wires from operative position.

In thepresent instance of the invention, the feeler carrier comprises-the side members 28 preferably one at each side'of the loom, and between the side members eX- tend the feelers 29. The end portions of the feelers 29 are held in sockets or open ings in the side members 28 of-the feeler carrier, and, as hereinbefore described with respect to the support of the end portions of the drop wire guides, the slots in the side members 28 are arranged with one inclined wall 30 which serves to position the feeler accurately on the side members of the feeler carrier when the feelers are engaged with the sockets. A cap-piece or cover 31 may be secured to the side members 28 by bolts 32 and serve to hold the ends of the feelers in place.

Each side member of the feeler carrier is provided with a hub portion 33, Fig. .4,- through which extendsthe rod or bar 34 and the hubportions of the side members may be secured in the fixed position relative to the bar 34 by set screws 35. From the construction described, and as shown in Fig. 4, the feeler carrier comprises a frame which is removable from associated relation with the 10c operative relation with the drop wires by otherparts of the warp .stop motion, and such removal is 'facilitatedby the fact that the feelers themselves are supported and given their detecting movement in aplane above the warpthreads, so that the warp threads and drop wires 'do not. interfere with ready removal of the feeler carrier.

Inthe present instance of the invention, the brackets 2 at each side of the loom frame are provided with supporting guides 36 which extend outwardly as illustrated in Figs. 1 and 3. The. side members 28 of the feeler carrierare provided with foot portions 37 which may rest upon one of the supporting guides 36 of, the brackets outside or beyond the end portions of the drop wire guides 8. The feeler carrier is given a reciprocating movement which. when interrupted by a released drop wire, will effect loom stoppage through a train of mechanism well understood. 'In the present instance 'the brackets 2 have mounted thereon for rocking movement, the rock-shaft 3 8 to which is secured the operating arm 39 actuated from a. suitable train of mechanism- -com1non towarp stop mot ons for effecting loom stoppage when one of the drop wires is released by a broken-or unduly slack warpthread; secured to and rising from the rock-shaft 38 is the ar1n4O, the upper end portions of which is bifurcated or has an open bearing 41 in which may be received' the projection from the feeler carrier. In the present illustration the projections for engagement with .t-he bifurcated or open end 4C1 are furnished by the side projecting from operative position by lifting it relative to the drop wires, it may also be disengaged from its operating'train of mechanism, so that the loom may run without stopping when the attendant has moved the feeler carrier from operative position.

It may be desirable at times to brace the feelers 29, especially where they are used in a wide loom, and to this end a feeler brace 43 is adjustably mounted upon the rod or bar 34 and secured in adjusted position by a set screw 44. The feeler brace 43 has hook portions d5, L6 and 47, which are adapted to engage with the feelers 29, and while supporting them in a vertical direction, also act to support them against deflection when one of the feelers is held and stopped by a drop wire.

The arrangement of the drop wires close relation back-to-back and with the feelers above'theplane of the warp threads, affords a warp stop motion of minimum dimension in the direction fore and aft ofsthe loom, and one'that will not interfere with the desirable size of the warp beam-or the amount of warp to be wound on the beam.

Since, also,the feelers are mounted above the warp threads, they may be readily moved from operative relation with the drop wires to suspend the stopping function of the warp stop motion;

for moving the two feelers in the same'direction toward and from the parallel row 2.-In a warp stop motion for looms,'the

ing an enlargement'atits upper face edge ancl-arrangedasa unitin two close parallelrows back-'to-baclgla drop wire guide passing through'the slotted drop wires'of each row above the plane 'of' the warp threads, a feeler arranged at each side of the two parallel rows of drop w res above the planeof the warp threads, a feeler car rierto which the two :feelersare secured, means for operatmg the carrier tOyCtlllSB the of drop wires included between them, and means for stopping the loom'when either 'feelerris arrestedby -a drop wire. 7

combination. of slotted drop wires each 'havfeelers to be reciprocated toward and from the two: rows of drop'wi re's included between them and each 'feeler to act only-ion the drop wires2of onerow, r

- 3. In a warprstop" motion' for looms, the

combination of slotted drop wires "each having an enlargement at its upper face edge and arranged as a unit in two close parallel rows back-to-back, a dropwire guide passing through the slotted'drop wires of each row above the plane of the warp threads, a feeler arranged at each side of the two parallel rows of drop wires above the plane of the warp threads and having a detecting movement in the horizontal plane passing through the drop wire guides, a feeler carrier to which the two feelers are secured, means for operating the carrier to cause the feelers to be reciprocated toward and from the two rows of drop wires included between them and each feeler to act only on the drop wires of one row.

4;. In a warp stop motion for looms, the

combination of a series of drop wires ar ranged in rows and provided each with an elongated guiding slot, a guide passin through the slots of the drop wires of eac row, brackets at each side of the loom frame having slots with an inclinedwall for positioning and supporting the ends of the drop wire guides, removable caps for holding the drop wire guides in the slots, feelers, a feeler carrier having side members for supporting the feelers above the plane of the warp threads and beyond the ends of the drop wire guides that the latterand the drop wires may be readily removed from the loom.

In a warp stop motion for looms, the combination or" drop wires having guiding slots, a drop wire guide substantially rectangular in cross-section passing through the guiding slots of the drop wires, a support at each side of the loom for supporting the ends of the drop wire guide and'having receiving and positioning recesses, one wall of which is inclined to cause the drop wire. guide to be properly positioned on the sup port when the ends of the guide are placed in the recesses.

6. In a Warp stop motion for looms, the combination of a series of drop wires arranged in a row, a feeler carrier having side members, a i'eeler supported with its largestcross-sectional dimension in a horizontal plane above the plane of the 'arp threads and extending between the side members ot the feeler carrier, and means for supporting and operating the feeler carrier that itwmay be moved from operative position above the warp threads by lifting it heightwise of the drop wires. i

7.7111 a warp stop motion for looms, the combination of a series 01 drop wires arranged in a row; a feeler carrier having side members, a feeler supported with its largest cross-sectional dimension in V a horizontal plane abovethe plane of the warp threads and extending between the side niembers of the feeler carrier, a brace for the "fee-lei: between the side members having hooked portions which engage the teeler, and means tor supporting and operating the teelcr carrler that it may be moved from operative position above the warp threads by lifting combination of a feeler carrier having side members provided with ieeler positioning slots one wall of which is inclined, a feeler extending between the side members of the feeler carrier and having its ends in said slots, and caps for securing the ends of the feeler in the positioning slots.

10. In a warp stop motion for looms, the

combination of drop wires each-having air enlargement at its upper face edge and arranged in two units each comprising two parallel'rows with the drop wires of such rows arranged back-toin close relation, a feeler arranged at each side of the two rows of drop wires comprising a unit and above the plane of the warp threads, a single feeler carrier to which all the feelers are connected and by which they are reciprocated in their detecting movements above the plane of the warp threads that eachfeeler may act only on thedrop wires of one row, and means for stopping the loom when the detecting movement of a teeler is arrested by a drop wire.

In testimony whereof, I name to this specification.

' EDWARD S. STIMPSON.

have signed my 

